I'm writing a story that mostly involves two people having a conversation with each other. I have much of exposition and character and cultural background stuff that I want to put inbetween the lines of dialogue. It basically has to be in there, but I'm worried about breaking up the dialogue too much and interrupting its flow. But I just don't see how I can get around it. It really want that stuff to be in there. One possibility would be to put as much exposition at the beginning, but I don't want my reader to get turned off by it when they're trying to get into the story. I don't know if I've even explained my problem well enough, but any tips?